Remove redundant NOTICE copied from LICENSE.

Identified using the below shell script:

$ find -H . -name LICENSE -type f -print0 | xargs -0 dirname \
  | while read dir; do \
    if [ -f "${dir}/NOTICE" ] \
        && diff "${dir}/LICENSE" "${dir}/NOTICE" >/dev/null; then \
      echo "${dir}/NOTICE"; \
    fi; \
  done

Now that http://r.android.com/r/1235427 and http://r.android.com/r/1238719 are
merged, LICENSE files copied into NOTICE files are no longer needed.

Bug: 67772237
Bug: 68860345

Test: manually built and diffed before and after system image notices
Change-Id: I3022ea668f363c1684eaaebe5ac1a25df4d24c7a
diff --git a/NOTICE b/NOTICE
deleted file mode 100644
index 0d05163..0000000
--- a/NOTICE
+++ /dev/null
@@ -1,23 +0,0 @@
-
-
-The MIT License
-
-Copyright (c) 2008 Paul Evans <leonerd@leonerd.org.uk>
-
-Permission is hereby granted, free of charge, to any person obtaining a copy
-of this software and associated documentation files (the "Software"), to deal
-in the Software without restriction, including without limitation the rights
-to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-copies of the Software, and to permit persons to whom the Software is
-furnished to do so, subject to the following conditions:
-
-The above copyright notice and this permission notice shall be included in
-all copies or substantial portions of the Software.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
-THE SOFTWARE.